A college was founded, for the education of young men to the ministry of the Connexion, by Selina countess of Huntingdon in 1768 at Trevecca-isaf near Talgarth, Brecknockshire.
Their highest summit north of the Usk, on the eastern side, where they are known as the Black Mountains, or sometimes the Black Forest Mountains, is Pen y Gader (2624 ft.) between Talgarth and Llanthony, and on the south-west the twin peaks of the Mynydd Du ("Black Mountain") or the so-called Carmarthenshire Vans or Beacons, only the higher of which, Fan Brycheiniog (2632 ft.), is, however, in Breconshire; while the centre of the crescent is occupied by the masses of the Brecknockshire Beacons or Vans (often called the Beacons simply), the highest point of which, Pen y Fan, formerly also known as Cadair Arthur, or Arthur's Chair, attains an altitude of 2910 ft.
Most of the older churches of central Brecknockshire and east Carmarthenshire were founded by or dedicated to members of Brychan's family.
The growth of Puritanism in Wales was neither strong nor speedy, although the year 1588, which witnessed the appearance of Bishop Morgan's Bible, also gave birth to two fierce appeals to the parliament, urging a drastic Puritanical policy in Wales, from the pen of the celebrated John Penry, a native of Brecknockshire (1559-1593).
It then divides Radnorshire from Brecknockshire, receives the Ithon on the left, passes Builth, and presently turns N.E.